- id
-
subject identification number
- center
-
enrolling center
- random
-
date of randomization
- treatment
-
placebo or gamma interferon
- sex
-
sex
- age
-
age in years, at study entry
- height
-
height in cm at study entry
- weight
-
weight in kg at study entry
- inherit
-
pattern of inheritance
- steroids
-
use of steroids at study entry,1=yes
- propylac
-
use of prophylactic antibiotics at study entry
- hos.cat
-
a categorization of the centers into 4 groups
- tstart, tstop
-
start and end of each time interval
- status
-
1=the interval ends with an infection
- enum
-
observation number within subject